package com.longcai.cm.base.filter;

import org.springframework.stereotype.Component;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

/**
 * 跨域过滤器
 *
 * @author c
 * @since 2016年6月19日
 */
@Component
public class CorsFilter implements Filter {

    @Override
    public void doFilter(ServletRequest req, ServletResponse res,
                         FilterChain chain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) res;
//        String[] allowDomain = {"https://backmgt.carlcare.com", "https://back.carlcare.com"};
//        Set<String> allowedOrigins = new HashSet<>(Arrays.asList(allowDomain));
//        String originHeader = ((HttpServletRequest) req).getHeader("Origin");
//        if (allowedOrigins.contains(originHeader)) {
//            response.setHeader("Access-Control-Allow-Origin", originHeader);
//        }
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, HEAD,OPTIONS");
//        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "authorization,token,Content-Type,XFILENAME,XFILECATEGORY,XFILESIZE,x_requested_with");
        response.setHeader("X-Frame-Options", "SAMEORIGIN");
        response.setHeader("X-XSS-Protection", "1;mode=block");
        response.setHeader("X-Content-Type-Options", "nosniff");

        HttpServletRequest request = (HttpServletRequest) req;
        if ("OPTIONS".equals(request.getMethod())) {
            response.setStatus(200);
            return;
        }
        chain.doFilter(req, res);
    }

    @Override
    public void init(FilterConfig filterConfig) {
    }

    @Override
    public void destroy() {
    }
}
